psychology can help you better understand people, yourself, this will help in relationships, job interviews, etc.
Career-wise:
Psychiatrist
Industrial-Organizational Psychologist
Neuropsychologist
Clinical Psychologist
Engineering Psychologist
Counseling Psychologist
Forensic Psychologist
School Psychologist
Sports Psychologist
etc. it's not all psychologists but it helps the same way statistics (as a course) will help you